evans



G. E. EVANS. Centrifugal Sugar-Machine.

Patented Oct. 1. 1867.

Inventor:

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GEORGE E. EVANS, OF BOSTON, MASSACHUSETTS Letters Patent No. 69,328,dated October 1, 1867.

IMPROVED CEN'IRIFUGAL APPARATUS I'0R WASHING SUGAR.

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TO ALL WHOM IT MAY CONCERN:

Be it known that I, GEQRGE E. Evans, of Boston, in the county ofSuffolk, and State of Massachusetts, have invented an improvement inCentrifugal Apparatus for Washing Sugar; and I do hereby declare thatthe following is afuli and exact description thereof, reference beinghad to the accompanying drawings, and to the letters of reference markedthereon.

The object of my invention is to increase the efficiency of what iscommonly known as the centrifugal sugar machine, and it consists in theemployment of a new means of attaching and detaching the circularpartition or basket invented and patented by Alexander Maekey andEberhardt Miiller, their patent being dated March 27, 1866, whichcircular partition is described by them as placed within and-concentricwith the revolving cylinder of the machine, and composed like it of wirecloth, or other foraminated materiah'by which means the sugar is keptnear the periphery of said cylinder in such a way as to insure the fullbenefit of the centrifugal force generated by the rapid rotationthereof. The invention of said Mackey and Muller is described by themalso to consist in the employment of a novel means of retaining the saidpartition in its place. I do not claim the use of saidpartition, myinvention being limited to an improvement of so much of the invention ofMackey and Miiller as consists in the use 'of the partition abovereferred to, by providing a new means of keeping it in place, anddispensing with cumbrous and heavy apparatus used by them for thispurpose.

In the machinery used by Mackey and Miiller a circular platform,indicated in the drawing attached to;

their specification as the' circular platform S, is used to keep thepartition inplacc. In practice this platform is frequently dispensedwith by thennand cleats or segments of the platform are used to keep thepartition in place. Both the platform and the cleats are of greatinconvenience, as causing obstructions-in shovelling out the sugar fromthe centrifugal t'ub after the sugar has been washed. The said Maokeyand Miiller also make .use of a lid, which is thus described: The lid Ris hinged at one side, and it is annular in form; it covers the annularchamber E, and its inner edge pressing down upon the top of thepartition prevents the said partition from being displaced from its holdupon the platform S. The disadvantages of connecting the lid with thepartition, as is done in Mackcy and Miillers machine, is the greatweight of lid, some eighty pounds, the resistance which it makes in therevolution of the machine requiring nearly double the power required inmachines with my improvement, and the inequality in the movement of themachine caused by the weight being on one side. In my improvement Idispense with the platform E and the lid R of Mackoy and Miillersmachine.

The construction of my machine is shown in the accompanying drawing,-making a part of my specification.

A is a centrifugal tub, provided with wirc-gauvie sides; B is a movablecircular partition or basket provided with a bottom or frame, shown inthe plan, Figures III and IV. The sides of this partition or basket maybe made of wire gauze, as shown in Figure II, or they may be made ofsheet metal without foramination, a peculiar feature of my invention, asshown in Figure I. This partition or basket is kept in place by means ofa hollow cone of sheet metal, I), which fits over the inner cone E,which supports the spindle on which the centrifugal revolves. In casethe inner cone is dispensed with a simple shaft may be placed in thebottom of the centrifugal tub, in which case a socket to fit over thiscentral shaft is substituted for the hollow cono D. A device for liftingthe basket B is shown at F, Figure II. This consists of two bent piecesof metal fastened together in such a manner as to form a cross, the endsof the arms fitting under the rim of the basket, when it is desired tolift the basket, the cross-pieces being attached at their point ofintersection to a cord passing over a pulley.

When the machine is to be charged with sugar the movable cover fordistribution, G,1ig. I, is placed over the basket B, which prevents theadmission of sugar within the basket B, but allows the sugar to fill thespace between the sides of the centrifugal tub A and the partition. Thesugar is dropped from the charger, making a wall between the basket Band the sides of the centrifugal tub A. The machine is then revolved. Assoon as the revolution commences I lift the basket, and the centrifugalforce keeps the wall in place. When the basket is made of wire gauze itis not nec essary to lift it out of the tub, but I prefer to dispensewith the wire gauze and to have the sides of the basket of sheet metal.When the basket is lifted out of the centrifugal tub the water can beplayed directly upon the wall of sugar, the washing being more perfectwhen there is n obstruction from the wire gauze.

I do not'claim the use of a circular inner foraminated. partition orcylinder in centrifugals as my invention, but limit my claims to theimproved partition or cylinder, as described, and to the mode ofoperating the same.

What I claim as my invention, and desire to secure by Letters Patent,is-

1. The movable inner circular cylinder or partition B in centrifugalsugar machines, either with or without foraminations, the same beingcapable of being attached without alteration of the centrifugal tub, bymeans of a conical or cylindrical socket fitting upon a central conicalor cylindrical shaft, substantially as described.

2. Constructing the inner cylindrical partition B, in centrifugal sugarmachines, of sheet metal or any equivalent material, withoutforaminations or interstices, substantially as described.

3. Operating the inner cylindrical partition B, when made withoutferaminatiens, to make a wall of sugar by lifting the same after therotation of the centrifugal has commenced.

I GEO. E. EVANS.

Witnesses:

JOHN L HAYES, BYRON Rosn.

